Antifriction-bearing



(N0 Model.) f

' A. J. GRINNBLL.

vANJJIFRIGTION BBMING.- y l No. 598,317. 'Patented-Feb.. l?, 1898t a yIrl-GZ- WENEESES "Ninn e STATES l PATENT rrrcn.

ANTIFRICTION-BEAFHNG SPECIFICATION forming part of Letters Patent No.598,317', dated February 1, 1898. Application filed February 1, 1897.Serial No. 621,385. (No model.)

To @ZZ whom it may concern:

Be it known that I, ADELBERT J.GR1NNELL,

A of Waltham, in the county of Middlesex and State of Massachusetts,have invented'certain new and useful Improvements in Antifriction-Bearings, of which the following is a specification.

This invention has relation to antifrictionl bearings for shafts, andmore especially for the crank-shafts of bicycles; and it has for itsobject to provide such improvements in the same as will render them moredurable and decrease the element of friction to a minimum.

To these ends the invention consists in the improvements in devices ofthe character specified, such as are illustrated in the accompanyingdrawings and now to be described in detail and then pointed out in theappended claims. A

Reference is to be had to the drawings and to the letters markedthereon, forming a part of this specification, the same lettersdesignating the same parts or features, as the case may be, whereverthey occur.

Ofv the drawings, Figure l represents in side elevation, Awith a portionbroken away, a crank-hanger equipped with my improvements. Fig. 2 is acentral vertical section on the line 2 2 of Fig. l and looking in thedirection of the arrow. Fig. 3 shows in perspective the spider and oneof the rings, one of the disks being in position to be inserted in thespider. Figs. 4 and 5 illustrate another embodiment of the invention.Figs. 6 and 7 illustrate another form of spider. i

In the drawings, ct represents a barrel or hanger which is formed orsecured to the converging bars b h b2 of the bicycle-frame.

@indicates the cran k-shaft, which is formed with a rigid hardened conec and an adjustable hardened cone c2 in threaded engagement therewith.

The barrel or hanger is formed with internal flanges a a', against whichhardened bearing-rings d d abut, being threaded into theinternally-threaded ends of the barrel. As each end of the hanger isprovided with the same device and constructed in the same way, I shalldescribe only one, and it" will be understood that the description willbe equally applicable to the other.

e indicates a spider which is U-shaped in a pin f, passed through theflanges e e2 of the V spider and projects through an aperture e3 in thespider, so as to have its periphery bear against the bearing-cone c' c2.Each disk is also formedwith oppositely-extending hubs f2 f3, the firstof which bears against the inner edge of' the ring b and the other ofwhich bears against the flange g on the outer ring g, which isexternally threaded and is screwed into theA end of the hanger orbarrel.

Preferably the ring g is formed with an outwardly-projecting fiange g2,which abuts against the end of the barrel, so as to tightly close thesame, and the ring dis also provided with apertures d3 to receive aspanner or other suitable tool by means of which the ring may be removedor secured in place. f Now it will be seen that each disk bears againstthecone at its periphery, its two hubs bearing against the inner edgesof the two rings d and g, both of Which are hardened, the disks beinglike- Wise hardened, so as to increase their wearing qualities. Theflange e of the spider is wider than that at c2 and extends up outsidethe flange on the ring g, so as to loosely secure the spider and thesaid ring g.

In securing the parts in place the ring d is vfirst screwed in until itabuts against the flange ct. Then the spider e is inserted through theaperture in the ring g until the flange g of the latter bears againstthe flange e ofthe spider. Then two of the disks are inserted in placeby slipping them between the flange e and the flange c2 of the spider,and the other disk is inserted in place, as shown in Fig. 3, therebeinga recess in the flange e2 to permit its insertion.

When the parts consisting of the ring, the spider, and the disks are allassembled, they are placed in the end `of the barrel, and the ring g isscrewed tightly in place. Then the shaft c is inserted and the cone o2is adj Listed until both sets of disks bear evenly at their peripherieson the cone and at their hubs on the rings.

For the purpose of preventing the accumulation of dust and dirt in thebarrel I provide dust-guards consisting of rings h, which may be forcedinto rabbets in the rings g.

Instead of forming the spiders U -shaped in TOO cross-section, as shown,I may form them of two parallel rings m m, connected together byshouldered rivets fm', as shown in Figs. 8 and 9.

In Figs. land 5 I have illustrated another embodiment of my invention inwhich I dispense with the spider. Referring to these last-mentionedfigures it will be seen that I employ two hardened rings j and 7c, whichare secured together by rivets 7c', having spacers 7a2, both rings beingrecessed, as shown in Fig. 4, to receive the hubs of the disks Z.A Inthis construction the rings are not threaded into the end of the barrel,but are forced in and held against rotation by a key k3. Thus from theforegoing it will be observed that I have provided a construction whichis extremely simpleand which at the saine time is highly efficient inoperation and possesses great durability and wearing qualities.

Each disk bears at three points, (one point with its periphery againstthe cone and at two points with its hub against the rings,) and byreason of its relatively large diameter (as compared with the ordinaryantifriction roll or ball) reduces the friction and requires less powerto rotate it.

In the construction shown in Figs. 1 to 3 the spider and the rolls maytravel relatively to the rings and the latter are held at apredetermined distance apart, and in the construction illustrated inFigs. 4 and 5 the disks are inserted loosely in place and bear looselyagainst the rings and are capable of traveling around the same and thecone, being properly spaced by their engagement with each oth-er. Inboth of these constructions, which I have described hereinbefore, thedisks are all free not only to revolve around the axis of the shaft, butare also adapted to revolve about the rings, each disk bearing with itsperiphery against the shaft (or the cone on the shaft) and having anoppositely-extending hub bearing against the edges of the ring. By thispeculiar arrangement the frictionA is reduced to a minimum.

I have stated that the rings are revoluble about the'shaft, for ofcourse it will be understood thatthe cones are to all intents andpurposes a portion of the shaft, but may be omitted, if desired.

I claim- 1. Abearin g for a shaft comprising a hanger or barrel, twoparallel rings inserted in each end, and a series of disks revolubleabout the axis of the shaft and adapted to roll around said rings, saiddisks each bearing with its periphery against the shaft and having anoppositely-extending hub bearing against the inner edges of the rings.

2. In combination, a shaft having cones, a barrel or hanger, twoparallel rings inserted in each end of the barrel, and a series of disksall revoluble about the shaft and adapted to roll around the rings, saiddisks having their peripheries bearing against the cones, and havingoppositelyextending hubs bearing against the said rings.

3. In combination, a shaft having cones, a barrel or hanger, twoparallel rings inserted in each end of the barrel, a series of disks allrevoluble about the shaft and adapted to roll around the rings, saiddisks having their peri pheries bearin g against the cones and havingoppositely-extending hubs bearing 'against the said rings, and means forspacing said disks.

4. A bearing for a shaft having cones comprising a barrel or hanger, twoparallel rings inserted in each end of the barrel and having a spacebetween them, a series of disks freely revoluble about the axis of theshaft and each provided withv an oppositelynprojecting hub, said diskseach bearing with its periphery against 'the cone, and with its hubagainst the inner edges of the rings, and spiders in which said disksare mounted.

5. The combination with a shaft, and a barrel, of parallel separatedrings arranged in said barrel, a spider arranged between the rings andthe shaft and having flanges, and a series of disks journaled in theianges of the spider, and bearing with their peripheries against theshaft, and having hubs bearing against the inner edges of the rings.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 29th day of January, A. D.1897.

ADELBERT J. GRINNELL'.

Witnesses:

E. B ATCHELDER, y P. W. PEZZETTI.

